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Theory and Modern Applications

Table 2 Accuracies in solution values in Example 5.2 with \(\pmb{\eta=100\pi,\delta=30 \pi^{2}}\)

From: A fourth-order accurate quasi-variable mesh compact finite-difference scheme for two-space dimensional convection-diffusion problems

L  + 1

\(\boldsymbol {\tilde{\alpha}}\)

\(\boldsymbol {\tilde{\beta}}\)

\(\boldsymbol {\mathcal{E}_{\infty}}\)

\(\boldsymbol {\mathcal{E}_{2}}\)

\(\boldsymbol {\Theta_{\infty}}\)

\(\boldsymbol {\Theta_{2}}\)

4

0

0

5.82e−02

3.52e−02

–

–

8

0

0

2.39e−02

1.16e−02

1.3

1.6

16

0

0

6.07e−03

2.38e−03

2.0

2.3

32

0

0

6.00e−04

2.02e−04

3.3

3.6

4

0.440

0.2900

7.39e−02

4.01e−02

–

–

8

0.280

0.2700

8.58e−03

1.59e−03

3.1

4.7

16

0.103

0.1020

2.61e−04

8.93e−05

4.9

4.2

32

0.000

0.0423

4.35e−05

5.15e−06

2.6

4.1